Periodic adaptive identification and control for a class of discrete time-varying systems

In this paper, we present a discrete periodic adaptive control for systems with time-varying parametric uncertainties which are periodic, and the only priori is the periodicity. The new adaptive controller updates the parameters and the control signal periodically in a pointwise manner over one entire period, in the sequel achieves the asymptotic tracking convergence. A simulation example illustrates the feasibility and effectiveness of the proposed method.